PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-06:57:50
G10     279.0          45.3                6.5 +/-    1.48       8.7 +/-    1.48  0.040 / 0.030
G13     38.1           9.7                -0.1 +/-    3.42      -0.3 +/-    3.42  0.040 / 0.030
G15     50.5           39.3                4.6 +/-    1.14       6.7 +/-    1.14  0.300 / 0.300
G20     319.4          63.9                5.7 +/-    0.87       6.3 +/-    0.87  0.190 / 0.280
G21     44.7           76.2                6.5 +/-    0.48       6.7 +/-    0.48  0.060 / 0.060
G24     110.7          20.0                6.8 +/-    1.28      15.0 +/-    1.28  0.060 / 0.050
G27     314.1          24.9                3.9 +/-    1.56       7.6 +/-    1.56  0.070 / 0.410
G29     166.1          17.1                3.5 +/-    2.05       8.2 +/-    2.05  0.090 / 0.330
G32     207.3          13.2                3.0 +/-    2.30       7.9 +/-    2.30  0.080 / 0.130